Dish washing machine



April 2, 1963 J. H. BEAR 3,083,717

" DISH WASHING MACHINE Filed April 8, 1960 6 Sheets-Sheet 1 lNVENTOR .famas' fllBea/r April 2, 1963 J. H. BEAR 3,083,717

DISH WASHING MACHINE Filed April 8, 1960 6 Sheets-Sheet 2 NH m u'nrnumw A iil z, 1963 J. H. BEAR 3,083,717

DISH WASHING MACHINE Filed April 8. 1960 6 Sheets-Sheet 5 INVENTOR James [i fear A ril 2", 1963 J. H. BEAR DISH WASHING MACHINE Filed April 8. 1960 6 Sheets-Sheet 4 INVENTOR James 15. flair April 2, 1963 J. H. BEAR 3,083,717

DISH WASHING MACHINE Filed April 8, 1960 6 Sheets-Sheet 5 INVENTOR James E Zeal April 2, 1963 J. H. BEAR DISH WASHING MACHINE 6 Sheets-Sheet 6 Filed April 8. 1960 INVENTOR fametsfl Bear III JIIII United States Patent C) 3,683,717 DISH WASHING M ACHINE James H. Bear, 89-5 1st Ave, New York, NE. Filed Apr. 8, 1969, Ser. No. 29,901 15 Claims. (Cl. 13457) The present invention relates to dish Washing machines and, more particularly, to improvements in dish washing machines of the type disclosed in my prior application for United States Letters Patent, Serial No. 525,444, filed August 1, 1955, now Patent No. 2,824,648, issued on February 25, 1958.

Dish washing machines of the aforementioned type generally comprise a washing chamber including :a collecting tank at the bottom thereof having a Water circulating outlet and a normally closed drainage outlet and a spray pipe above the collecting tank having an inlet; a rinse water supply tank having an outlet; a pump having an inlet and an outlet; a valve for selectively connecting the pump inlet to the circulating outlet for the collecting tank and the outlet of the rinse Water tank; waste collecting means for the drainage outlet adapted to prevent Waste from being recirculated; and an arrangement for opening the drainage outlet and connecting the pump inlet to the rinse water supply tank outlet.

While dish washing machines of this type have met with considerable commercial success, certain disadvantages and inconveniences thereof have not yet been corrected. For example, one of the disadvantages has been that gravity flow Was relied upon to drain the wash water and waste from the collecting tank and the rinse water following the Wash water. This required a large drain pipe in order to guard against clogging. However, most buildings do not have sufliciently large drainage pipes connected to the pipe leading to the sewer to match a large drain pipe, whereby a downstream bottle neck developed at the connection between the drain pipe and the smaller drainage pipe of the building. Attempts have been made to overcome such difiiculties by placing a waste collecting basket across the drain, but this is disadvantageous because the user of the machine must empty out, wash and replace the basket after each use of the machine. Also, if a large amount of waste is collected, it may partially clog the openings of the basket and slow down drainage of the wash water, whereby the added rinse water may cause the water level to raise to a point where it reaches the dishes and thus interfere with the proper rinsing of the dishes.

One of the inconveniences to the users of such machines is that no provision was made for heating and regulating the temperature of the Wash and rinse water, so that the water was maintained at a sterilizing temperature, whereby a supply of water was required to be heated by the user because hot water supply systems in homes and buildings are so regulated that the temperature of the water will not scald persons. Consequently, the hot water available is well below the required sterilizing temperature.

Another inconvenience is that the user of the machine is required to rely on his judgment as to the amount of wash and rinse water to be used. This results in Wasteful use of the hot water or improper washing and rinsing of the dishes.

Accordingly, an object of the present invention is to provide an improved dish washing machine of the foregoing type Which is not subject to the prior disadvantages and inconveniences.

Another object is to provide such a machine which positively ejects the used wash water and the waste in a manner whereby normal size drainage pipes can be used without danger of clogging the same.

Another object is to provide such a machine which includes an automatic water heating system.

Another object is to provide such a water heating systern which heats the water to the sterilizing temperature and maintains the portion thereof reserved for rinsing at that temperature during the washing cycle, whereby the rinse water, like the wash, is at the sterilizing temperature and thus is sufficiently hot to induce self-drying of the dishes.

Another object is to provide such a machine which includes an arrangement for measuring and proportioning the wash and rinse Water whereby the proper amounts are available for the respective washing and rinsing cycles without any guesswork on the part of the user of the machine.

Another object is to provide such a machine which cleans itself and assures disposal of waste through the drainage pipe of the building.

Another object is to provide a novel pumping, valving and control system which makes the foregoing improvernents possible.

A further object is to accomplish the foregoing in a simple, practical, economical and reliable manner.

Other and further objects will be obvious upon an understanding of the illustrative embodiment about to be described, or will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.

A preferred embodiment of the invention has been chosen for purposes of illustration and description and is shown in the accompanying drawing, forming a part of the specification, wherein:

FIG. 1 is a front elevational view of the machine of the invention with the door removed.

FIG. 2 is a sectional view taken along the line 22 on FIG. 1.

FIG. 3 is a sectional view taken along the line 33 on FIG. 1.

FIG. 4 is a sectional view taken along the line 4-4 on FIG. 2.

FIG. 5 is an enlarged sectional View taken along the line 55 on FIG. 2.

FIG. 6 is a schematic view of certain control devices and electrical circuits.

Referring now to the drawings in detail, there is shown a dish washing machine which generally comprises a housing 10, a washing chamber or tank 11 within the housing for receiving the dishes or other articles to be washed, a hot water supply tank 12 adjacent the washing chamber, a spray pipe 14 in the washing chamber for directing wash and rinse water onto the articles to be washed, and a pumping and valving system (FIG. 5) connected to the washing chamber 11, the supply tank 12 and the spray pipe 14, in the manner described hereinafter.

The Washing Chamber The washing chamber 11, as best shown in FIGS. 1, 2 and 4, is in the form of a rectangular tank having a back wall 15, a top wall 16, side Walls 17, a front Wall provided by -a door 18 which is closed while the machine is in use and is adapted to be opened to load and unload the machine, and an open bottom leading directly to a circular collecting tank 19 (FIGS. 2 and 4).

Provision is made for supporting suitable racks or baskets 20 in the chamber both above and below the spray pipe 14 (FIG. 1).

The collecting tank 19 (FIG. 2) has a capacity at least equal to the volume of the wash water to be used and is provided with a central Water and waste removal outlet 21 and a Water circulating outlet 22 at one side. A

{impel-shaped waste collecting sieve 23 extends from the upper edge of the collecting tank to the removal outlet 21 and has an imperfor-ate sleeve 24 at its lower end seated in'the outlet 21, so that the collected waste is isolated from the circulating outlet 22 and is discharged h ou th i u t The Hot Water Supply Tank Thehot water supply tank 12, as best-shown in-FIGS. 2 and'4, isnarrow and rectangular and is located adjacent the back of the washing chamber. This tank has a capacity for storing the required wash and rinse'water has an outlet 25 at the bottom thereof; An electrical heating unit 26islocated near the bottom of the tank.

. The tank 12 is provided with a water supply and control systemwhich includes a valve 27, a float 28 and a heater circuit (FIG. 6).

The valve 27 comprises. a body having an opening 30 (FIG. 6) which serves as both an inlet and outlet and is in communication with the; interior of the tank near its upper end, an inlet 31 connected by a conduit 32 to a supply'of tapwater and anoutlet 34 connected by a pipe 35' to the collecting tank 19; a valve member 36 in the body which is constructedand arranged to establish communicationbetweenthe inlet 31 and theopening 30 and shut, on" communication betweenthe opening 3t) and the outlet 34when in one position andto establish communication between the opening 301 and the outlet 34 and to shut o'fi communication between the inlet 31' and the opening when. in another position; a rod 37 for operating the valve memberto position the same which rod extends to the front of the machine and has a control handle 38 thereon.

The opening 30' is so locatedthat, when the tank 12 has been filled to a predetermined level about it and it is placed in communication withthe valve outlet 34, a predetermined volume of hotwater can be withdrawn from the supply tank 12 and'd'elivered via conduit 35 to the collecting tank 19 for use in the washing cycle. Thus, when the-watenlevel drops to just below the opening3tl, flow ceases and the remaining predetermined volume of water is reserved for use in the rinsing. cycle.

The float 28 has a stem 39' which is connected toa shutaoff -valve- 40 ,inthe water supply conduit 32 and is so arranged that the valve is closed when-a predetermined volume of water has entered the tank and the water level is at a predetermined distance above the opening 30, wherebythe portions of the water above and below the opening are measured. a

The heater circuit, asshown in FIG. 6, includes: lines 41 and .42. for connecting the heater 26 to a supply of household current through a thermostatically controlled switch 43 and, aswitch 44 under the, control of the float 28. The thermostatically controlled-switch 43disconnects-the heater 26 from the supply-when thetemperature. of the. wateris of a desired value, for example, 180 F. The float controlled switch 44 disconnects the heater-26 from the supply current when the water level in the tank drops a slight distance below .the lowermost portion of the opening 30, while the rinse water is being withdrawn, so that the heater-is incapable of further operation when the. tank has been emptied. Howevenwhilethe rinse wateris still in the tank during the. washing cycle, the temperature thereof can be maintained at the desired- Value by on andv off operation of the thermostatically con-' trolled switch 43. The heater circuit may further include a lamp 49 at the front of the machine (FIG. 1) which is illuminated while the heater 26 is energized and which upon-being-extinguished indicates that the water has been heated to its proper temperature.

Ifdesired, the tank 12 may be provided with a ventingpipeSO at its-upper end, whichpipe communicates with-the washingchamber to relieve air above the water levelinthe tank .12 asthewater is. being heated:

The Spray Pipe The spray pipe 14, as shown in FIGS. 1 to 4, extends across the washing chamber 11 and is mounted for oscillation at the sides of the washing chamber tank. A gland 51 supports one end of the spray pipe which has an inlet 52 for supplying water to the spray pipe. As shown in FIG. 3, the spray pipe is oscillated by a mechanism 53 which is dn'ven'by a motor 54. This mechanism and the spray pipe are disclosed in the patent referred to herein.

The Pumping and Valving System The pumping and valving system is bestillustrated in FIGS;,2v and 5 and includes a main or water circulating pump 55 and a secondary or water removal pump 56, both pumps being of the rotary type and being located side by side for operation by the motor 54, and a-valve 57 for controlling this system.

The mainpump 55 has an inlet 59 and an outlet 60; and the secondary pump 56 has an inlet 61 and an outlet 62. These inlets and outlets are connected in the manner about tobedescribed.

The valve 57, as illustrated herein, comprises a body having a port 64 connected by a pipe 65 to the outlet 25 of'the .hotwater supply-tank, a port 66 connected to the inlet 59 of the mainpump 55', a seat 67 between the ports 64 an,di66 ,1a; port 68 connected to outlet 22 of the collect ing tank 19, a seat 69 between the ports '66 and 68, a valve1member 70-.adaptedtoengage either of the seats 67 or 69, a port 71 connected to the waste removal outlet 211- of-the collecting tank, a port 72 connected to the inlet 61 of the secondary pump 56, a seat 74 between the ports 71 and 72', a valve member 75'- for. the seat 74 adapted to control communication between the ports 71 and 72, avalve stem-'76 having the valve members 70 and 75 mounted thereon, so that the valve member 70 engages the seat 67 and the valve member 75-engages the seat74, a spring, 77 for normally urging the stem in the aforementioned position and a solenoid 78 for moving the stem in opposition to the spring to cause the valve member, 70xto engage the seat'69wand' cause the valve member 75 to be unseated and retracted to the right, as viewed-in FIG. 5, to clear theyopening of the seat 74 between the ports .71 and 72.

The solenoidg78;=andthe motor 54 are under the CD11. trol of a switch 79 (FIG. 6) adjacent the control handle 38 =at'the front of-the. machine. To accomplish this, the switch 79, has two 'ON positions and, an intermediate ()FF position; ln-its right-hand, posit-ion, only the motor 54- is energized, while in its left hand position both the motor and the solenoid 78 are energized.

The outlet '60 of the main pump 55 is connected to the inlet 52' of the spray'pipe 14 lvia conduit 80, and the outlet 62 of the secondary pump-56 is. connected to: the drainage pipe lot-the building via conduit 81, as seen in FIGS. 3 and 5.

Operation Inoperating the washing machine, the handle 38 is positioned to establish communication between the valve opening 30 and the water supply inlet 31 and the switch 79- is positioned, to deenergize the solenoid 78, so that the valve members 70 and 75 are in the position shown in FIGS. 2 and 5. When the valve 57 is so. positioned, the waste removal outlet 21 of the collecting tank 19 is shut OE and the water circulating outlet 22 ofthe tank '19 is incommunication with theinlet 59' of the main pump 55 via conduit 82. a

The tap (not shown) connected -to the water supply conduit 32 is then opened. Since the float 28 is down, the heater 26 is shut otf and the valve is open, whereby water enters the tank'12. When the water rises to the level of the opening 30, the float closes the heater energizing switch, the lamp 49' is illuminated, and heating of the water begins. When tank;-12;is.alrnost full and;con.-"

tains the desired volume of water, the float 28 shuts ofi .the valve 27.

Heating of the water in the tank 12 continues until it reaches the desired temperature and, when that temperature is reached, the thermostatically controlled switch deenergizes the heater and extinguishes the lamp 49. This gives an indication that the machine is ready for use and that the tap can now be closed.

The dishes or other articles to be washed can be placed in the washing chamber while the water is being heated or the water can be heated well in advance and is kept so heated, so that the dishes can be washed immediately after the meal has been finished. The desired amount of detergent is placed in the bottom of the collecting tank 19 while loading the machine, and the door 18 is then closed, whereby the machine is ready for use.

The valve handle 38 is now turned to position the valve 27, so that the opening 39 is in communication with the outlet 34, whereby the desired volume of wash water is withdrawn from tank 12 and is delivered by gravity flow to the collecting tank 19.

The motor 54 is then energized to operate the pumps 55 and 56 by moving the switch 79 to the right (FIG. 6), corresponding to switch handle 83 (FIGS. 13). The secondary pump 56 idles, but the main pump 55, by reason of the position of the valve 57, withdraws water from collecting tank 19 and delivers it to the spray pipe 14 which directs the same against the dishes. Afte the water has been circulated once, the detergent is admixed therein and the dishes are washed eflectively therewith. The washing cycle is continued for a desired length of time and the wash water circulates, as described, to wash waste from the dishes and to deposit the same in the waste collection basket 24. A large quantity of waste can be collected because of the size of the basket 24 which has sufficient opening at its upper portion to enable water to pass therethrough even if the lower portion is filled with Waste.

When the washing cycle has been completed, the switch 79 (handle 83) is moved to the left (FIG. 6) to energize both the motor 54 and the solenoid 78, whereby the valve members 70 and 75 are moved to their other positions, to the right, as seen in FIG. 5. The valve member 70 is then on the seat 69 to shut off communication between the main pump inlet 59 and the collecting tank outlet 22, the seat 67 is free to establish communication between the supply tank outlet and the main pump inlet 59 via pipe 65, and the seat 74 is unclosed by the valve member 75 to establish communication between the waste collection outlet 21 and the secondary pump inlet 61.

The main pump 55 new functions to pump the water from the tank 12 and to deliver it to the spray pipe which directs it onto the dishes to rinse the same. The secondary pump 55 new functions to pump the waste collected in the basket 24 and the water collected in the tank 19 to the drainage pipe of the building via conduit 81 (FIG. 3). Since the waste is admixed with a considerabie volume of water, the pump 56 by its rotary action reduces the waste to a free flowing slurry which readily passes through the drainage pipe of the building. The pump 56 thus acts like a garbage disposal unit.

The rinse water directed through the spray pipe 14 also washes the basket 24 and then passes through the pump 56 to clean the same. After all the rinse water has been used and pumped into the drainage pipe, the solenoid is deenergized and the motor is stopped.

When the rinsing and waste disposal operation has been completed, the switch 79 is moved into its neutral position (FIG. 6) to stop the motor 54 and deenergize the solenoid 78.

From the foregoing description, it will be seen that the present invention provides an improved dish washing machine which proportions the wash and rinse water, automatically heats the water, assures disposal of the waste and is self cleaning. All this is accomplished in a practical, reliable and economical manner.

As various changes may be made in the form, construction, and arrangement of the parts herein, Without departing from the spirit and scope of the invention and without sacrificing any of its advantages, it is to be understood that all matters are to be interpreted as illustrative and not in any limiting sense.

What is claimed is:

1. In a dish washing machine, the combination of a housing; a washing chamber in said housing including a Water collecting tank at the bottom thereof having a water circulating outlet and a water removal outlet and a spray pipe above said collecting tank having an inlet; a hot water supply tank in said housing adjacent said chamber having outlet means for delivering water to said collecting tank and having an outlet pipe; a main pump having inlet means arranged for fluid flow communication with said circulating outlet of said collecting tank and said outlet pipe of said supply tank and having outlet means connected to said spray pipe inlet; a secondary pump having inlet means arranged for fluid flow communication with said removal outlet of said collecting tank; and valve means including elements for establishing communication between said collecting tank circulating outlet and said main pump inlet means and shutting off communication between said supply tank outlet pipe and said main pump inlet means and for shutting ofi communication be tween said collecting tank removal outlet and said secondary pump inlet means, when in one position, and for establishing communication between said supply tank outlet pipe and said main pump inlet means arid shutting off communication between said collecting tank circulating outlet and said main pump inlet means and for establishing communication between said collecting tank removal outlet and said secondary pump inlet means, when in another position, said supply tank outlet means including a pipe having an inlet adjacent the top of the supply tank for withdrawing the water above it and delivering the same to the collecting tank, and a valve for controlling said pipe inlet.

2. A dish washing machine according to claim 1, wherein means are provided for regulating the water level in said supply tank, whereby said pipe inlet delivers a measured volume of water to said collecting tank.

3. A dish washing machine according to claim 2 including a Water supply conduit having an outlet in said supply tank and being under the control of said Water level regulating means.

4. A dish washing machine according to claim 3, wherein said valve is arranged to close said pipe inlet and open said supply conduit outlet, when in one position, so as to fill said tank to said regulated water level, and to open said pipe inlet and close said supply conduit outlet, when in another position, so as to deliver to the collecting tank said measured volume of water.

5. A dish washing machine according to claim 2, including water heating means for said supply tank rendered effective by said water level regulating means when the water is at a desired level and rendered ineffective by faid regulating means when the water is below a desired evel.

6. A dish washing machine according to claim 5, wherein said heating means are under the control of temperature responsive means to regulate the temperature of the water in said supply tank.

7. A dish washing machine according to claim 6, includlng means for indicating when the water in the supply tank has been heated to a desired temperature.

8. In a dish washing machine, the combination of a housing; a washing chamber in said housing including a water collecting tank at the bottom thereof having a water circulating outlet and a water removal outlet and a spray pipe above said collecting tank having an inlet; a hot water supply tank in said housing adjacent said chamber having outlet means for delivering water to said collecting tank and having an outlet pipe; a' main pump having inlet means arranged for fluid flow communication with said circulating outlet of said collecting tank and said outlet pipe of said supply tank and having outlet means connected to said spray pipe inlet; a secondary pump having inlet means arranged for fluid flow communication with said removal outlet of said collecting tank; and valve means including elements for establishing communication'between said collecting tank circulating outlet and said main pump inlet means and shutting off communication between said supply tank outlet pipe and said main pump inlet means and for shutting off communication between said collecting tank removal outlet and said secondary pump' inlet-means,.when in one position, and for establishing communicationbetween said supply tank outlet pipe and said main pump inlet means and shutting of communication between said collecting tank circulating outlet and said m'ain'pump inlet means and for establishing communication between said collecting tank removal and said secondary inlet means, when in another position, said valve means comprising a body having a port for said supply tank outlet pipe, a port for said main pump inlet means, a first seat between said ports, a port for said collecting tank circulating outlet, a second seat between said'last mentioned port and said main pump in let means, a port for said collecting tank removal outlet and said'secondary pump inlet means and a third valve seat betweensaid two last mentioned ports, a-fir'st valve member for said first and second seats, a second valve member for said third seat, a valve stem having said valve members mounted thereon so'that said first valve member engages said first seat when said second'valve member engages said third seat and so that said first outlet member engages said second seat when said second valve member-is off its seat, and means for operating said valve stem.

9; A dishwashing machine according to claim 8, wherein said valve stem operating means includes a spring for normally urging said valve stem to cause said valve members to assume the first described position and a solenoid for moving said valve stem to cause said valve members to assume the second described position. 7

10. In a dish washing machine, the combination of a housing, a washing chamber in said housing; a hot water supply tank in said housing adjacent said-chamber having a normally closed discharge opening and outlet'means for delivering water-to said chamber; and means having a water supply outlet in communication withsaid outlet means and an inlet near the top of said tank in flow communication therewith and with a water supply line, said means including valve means operable to close saidinlet and open said outlet when in one'position and to close said outlet and open said inlet when in another position, whereby the water stored in said tank above said inlet may be Withdrawn and delivered to the washing chamber for a washing cycle.

11. A washing machine according to claim 10, including a valve in said supply line, liquid level responsive means in said tank, and means operatively connecting said responsive means and said valve to close said valve when the level of the water in said tank is a predetermined distance above said inlet to establish a predetermined quantity of water to be withdrawn. 7

12. A washing machine according to claim 11, including means for heating the Water stored in said tank, control means for rendering said heating means effective and ineffective, and means operatively connecting said responsive means and said control means to cause said control means to render said heating means ineffective when the level of the Water in said top drops below said inlet when water is withdrawn through said discharge opening.

13. A washing machine according to claim 12, wherein said control means include temperature responsive means for regulating said heating means to heat the water in said tank to and'maintain the same at a predetermined temperature. i

14. A washing machine according to claimlO, including a pump having inlet means connected to said discharge opening and outlet means connected to said chamher, and a valve for normally closing said discharge openingand operable to open the same, whereby the water below said inlet under the control of said valve may enter said pump inlet means and be delivered through said outlet means to said chamber for a rinse cycle.

15. A washing machine according to claim 14, includ ing flow conducting means in'connection with saidpump and said valve for pumpingthe water withdrawn through said pump inlet means.

References Cited in the file of this patent UNITED STATES PATENTS 1,228,363 MacKenzie an May 29; 1911 1,550,439 Irvin Aug. 18, 1925 2,681,658 Meeker et al June 22, 1954' FOREIGN PATENTS 711,726 Germany Q Oct. 6, 1941 859,597 Germany Dec. 15, 1952 

1. IN A DISH WASHING MACHINE, THE COMBINATION OF A HOUSING; A WASHING CHAMBER IN SAID HOUSING INCLUDING A WATER COLLECTING TANK AT THE BOTTOM THEREOF HAVING A WATER CIRCULATING OUTLET AND A WATER REMOVAL OUTLET AND A SPRAY PIPE ABOVE SAID COLLECTING TANK HAVING AN INLET; A HOT WATER SUPPLY TANK IN SAID HOUSING ADJACENT SAID CHAMBER HAVING OUTLET MEANS FOR DELIVERING WATER TO SAID COLLECTING TANK AND HAVING AN OUTLET PIPE; A MAIN PUMP HAVING INLET MEANS ARRANGED FOR FLUID FLOW COMMUNICATION WITH SAID CIRCULATING OUTLET OF SAID COLLECTING TANK AND SAID OUTLET PIPE OF SAID SUPPLY TANK AND HAVING OUTLET MEANS CONNECTED TO SAID SPRAY PIPE INLET; A SECONDARY PUMP HAVING INLET MEANS ARRANGED FOR FLUID FLOW COMMUNICATION WITH SAID REMOVAL OUTLET OF SAID COLLECTING TANK; AND VALVE MEANS INCLUDING ELEMENTS FOR ESTABLISHING COMMUNICATION BETWEEN SAID COLLECTING TANK CIRCULATING OUTLET AND SAID MAIN PUMP INLET MEANS AND SHUTTING OFF COMMUNITION BETWEEN SAID SUPPLY TANK OUTLET PIPE AND SAID MAIN PUMP INLET MEANS AND FOR SHUTTING OFF COMMUNICATION BETWEEN SAID COLLECTING TANK REMOVAL OUTLET AND SAID SECONDARY PUMP INLET MEANS, WHEN IN ONE POSITION, AND FOR ESTABLISHING COMMUNICATION BETWEEN SAID SUPPLY TANK OUTLET PIPE AND SAID MAIN PUMP INLET MEANS AND SHUTTING OFF COMMUNICATION BETWEEN SAID COLLECTING TANK CIRCULATING OUTLET AND SAID MAIN PUMP INLET MEANS AND FOR ESTABLISHING COMMUNICATION BETWEEN SAID COLLECTING TANK REMOVAL OUTLET AND SAID SECONDARY PUMP INLET MEANS, WHEN IN ANOTHER POSITION, SAID SUPPLY TANK OUTLET MEANS INCLUDING A PIPE HAVING AN INLET ADJACENT THE TOP OF THE SUPPLY TANK FOR WITHDRAWING THE WATER ABOVE IT AND DELIVERING THE SAME TO THE COLLECTING TANK, AND A VALVE FOR CONTROLLING SAID PIPE INLET. 